Caching handles?

[Sterling Hughes <st...@designmultimedia.com>]

	Hi,

	I'm developing a module (httpd2.0) and I've come across a situation
	where it would be great if I could "cache" an operation, by saving a
	variable in memory, and keep it there throughout requests, ie:

	/* top level */
	static int module_id;

	/* in init func */
	module_id = cache_init();

	/* In some other function */
	cache_storage *p;
	some_type_t   *what_we_want; /* gotta love that variable name :) */

	if (cache_get(module_id, &p) == SUCCESS) {
		what_we_want = p->data;
	}
	else {
		what_we_want = alloc_new();
		cache_store(module_id, &what_we_want);
	}

	/* Manipulate what_we_want */

	Is something like this available?  (I don't need a full explanation,
	although I wouldn't mind one, just a pointer to the source I should
	be looking at...)

	Thanks,
	Sterling

Re: Caching handles?

[Ryan Bloom <rb...@covalent.net>]

The closest thing to what you want to do is probably mod_file_cache.

Ryan

On Friday 17 August 2001 22:40, Sterling Hughes wrote:
> Hi,
>
> 	I'm developing a module (httpd2.0) and I've come across a situation
> 	where it would be great if I could "cache" an operation, by saving a
> 	variable in memory, and keep it there throughout requests, ie:
>
> 	/* top level */
> 	static int module_id;
>
> 	/* in init func */
> 	module_id = cache_init();
>
> 	/* In some other function */
> 	cache_storage *p;
> 	some_type_t   *what_we_want; /* gotta love that variable name :) */
>
> 	if (cache_get(module_id, &p) == SUCCESS) {
> 		what_we_want = p->data;
> 	}
> 	else {
> 		what_we_want = alloc_new();
> 		cache_store(module_id, &what_we_want);
> 	}
>
> 	/* Manipulate what_we_want */
>
> 	Is something like this available?  (I don't need a full explanation,
> 	although I wouldn't mind one, just a pointer to the source I should
> 	be looking at...)
>
> 	Thanks,
> 	Sterling

-- 

______________________________________________________________
Ryan Bloom                        	rbb@apache.org
Covalent Technologies			rbb@covalent.net
--------------------------------------------------------------

Re: Caching handles?

[Graham Leggett <mi...@sharp.fm>]

Sterling Hughes wrote:

>         I'm developing a module (httpd2.0) and I've come across a situation
>         where it would be great if I could "cache" an operation, by saving a
>         variable in memory, and keep it there throughout requests, ie:

Take a look inside the code inside httpd-2.0/modules/ldap/util_ldap.c -
an operation shared memory cache is used there to cache LDAP queries -
it should give you an example to get you on the right track.

Regards,
Graham
-- 
-----------------------------------------
minfrin@sharp.fm		"There's a moon
					over Bourbon Street
						tonight..."